Olin Corporation (OLN) Ownership
OLN ownership summary
as of October 18, 2026- Institutions
- 107.1% of shares outstanding
- Insiders
- 0.38% of shares outstanding
- Shares outstanding
- 114.0M
- Float
- 107.6M shares available to trade
- Short interest
- 14.41% 14.2M shares short
- Days to cover
- 5.33 short interest up 22.6% vs prior month
- Institutions 107.13%
- Insiders 0.38%
OLN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Hotchkis & Wiley Capital Management LLC | 14.06% | 16.0M | $250.7M | +936,990 (+6.2%) | June 30, 2026 |
| 2 | BlackRock Inc | 10.51% | 12.0M | $187.6M | +497,398 (+4.3%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 5.41% | 6.2M | $96.5M | +538,480 (+9.6%) | June 30, 2026 |
| 4 | AQR Capital Management LLC | 4.83% | 5.5M | $86.2M | +4.3M (+372.5%) | June 30, 2026 |
| 5 | Vanguard Portfolio Management, LLC | 4.78% | 5.4M | $85.3M | +8,071 (+0.1%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 4.51% | 5.1M | $80.4M | +99,604 (+2.0%) | June 30, 2026 |
| 7 | State Street Corp | 4.21% | 4.8M | $75.1M | −230 (−0.0%) | June 30, 2026 |
| 8 | Fuller & Thaler Asset Management Inc | 3.77% | 4.3M | $67.3M | −714,287 (−14.2%) | June 30, 2026 |
| 9 | Yacktman Asset Management Co | 3.69% | 4.2M | $65.9M | +117,192 (+2.9%) | June 30, 2026 |
| 10 | Pzena Investment Management, LLC | 3.41% | 3.9M | $60.9M | −541,409 (−12.2%) | June 30, 2026 |
| 11 | The Goldman Sachs Group Inc | 2.24% | 2.6M | $39.9M | −286,078 (−10.1%) | June 30, 2026 |
| 12 | Citadel Advisors Llc | 1.96% | 2.2M | $35.0M | +593,302 (+36.2%) | June 30, 2026 |
| 13 | Semper Augustus Investments Group LLC | 1.89% | 2.2M | $33.7M | +124,507 (+6.1%) | June 30, 2026 |
| 14 | Geode Capital Management, LLC | 1.85% | 2.1M | $33.0M | −4,428 (−0.2%) | June 30, 2026 |
| 15 | Charles Schwab Investment Management Inc | 1.35% | 1.5M | $24.2M | −14,020 (−0.9%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 1.21% | 1.4M | $21.7M | −267,057 (−16.2%) | June 30, 2026 |
| 17 | CapTrust Financial Advisors | 1.16% | 1.3M | $20.7M | +1.3M (+6,314.7%) | June 30, 2026 |
| 18 | Bank of America Corp | 1.13% | 1.3M | $20.1M | −490,007 (−27.6%) | June 30, 2026 |
| 19 | Bank of New York Mellon Corp | 1.05% | 1.2M | $18.8M | −32,856 (−2.7%) | June 30, 2026 |
| 20 | Northern Trust Corp | 0.88% | 1.0M | $15.7M | +15,416 (+1.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 8.6M shares and 9 cut 2.4M.
OLN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Windsor II Inv | 4.39% | 5.0M | $78.4M | — | June 30, 2026 |
| 2 | iShares Core S&P Mid-Cap ETF | 3.60% | 4.1M | $64.2M | −1,464 (−0.0%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.19% | 3.6M | $56.9M | −5,159 (−0.1%) | August 31, 2026 |
| 4 | Undiscovered Managers Behavioral Val L | 2.82% | 3.2M | $50.2M | −71,600 (−2.2%) | August 31, 2026 |
| 5 | Vanguard Small Cap Index | 2.25% | 2.6M | $40.2M | −52,557 (−2.0%) | September 30, 2026 |
| 6 | AMG Yacktman I | 1.93% | 2.2M | $34.5M | — | September 30, 2026 |
| 7 | Vanguard Selected Value Inv | 1.80% | 2.1M | $32.2M | −353,622 (−14.7%) | June 30, 2026 |
| 8 | Vanguard MStar Small Cap Value Index | 1.47% | 1.7M | $26.1M | +5,705 (+0.3%) | September 30, 2026 |
| 9 | DFA US Small Cap Value I | 1.36% | 1.5M | $24.2M | +201,454 (+15.0%) | August 31, 2026 |
| 10 | Hotchkis & Wiley Small Cap Value I | 1.32% | 1.5M | $23.5M | — | August 31, 2026 |
| 11 | Hotchkis & Wiley Opps Instl | 1.15% | 1.3M | $20.5M | — | September 30, 2026 |
| 12 | American Beacon Small Cp Val R5 | 1.10% | 1.3M | $19.6M | −62,800 (−4.8%) | August 31, 2026 |
| 13 | AMG Yacktman Focused N | 0.87% | 995K | $15.6M | — | September 30, 2026 |
| 14 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.74% | 843K | $13.2M | +9,819 (+1.2%) | September 30, 2026 |
| 15 | DFA US Targeted Value I | 0.70% | 798K | $12.5M | — | August 31, 2026 |
| 16 | Dimensional US Small Cap Value ETF | 0.59% | 674K | $10.6M | +204 (+0.0%) | September 24, 2026 |
| 17 | BlackRock Event Driven Equity Instl | 0.58% | 657K | $10.3M | — | August 31, 2026 |
| 18 | State Street SPDR Port S&P 400 Md CpETF | 0.53% | 603K | $9.4M | −848 (−0.1%) | September 30, 2026 |
| 19 | Dimensional US Targeted Value ETF | 0.53% | 602K | $9.4M | +118 (+0.0%) | September 30, 2026 |
| 20 | Schwab US Small-Cap ETF™ | 0.53% | 600K | $9.4M | +405 (+0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OLN insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-24 | Angela M Castle | Sell | $24.25 | 2,379 | $57,691 |
| 2026-02-03 | R Nichole Sumner | Sell | $22.49 | 4,750 | $106,827 |
| 2026-02-03 | Todd A Slater | Sell | $22.48 | 92,250 | $2.1M |
| 2025-11-26 | Teresa M Vermillion | Sell | $20.86 | 4,500 | $93,870 |
| 2025-08-13 | Teresa M Vermillion | Sell | $21.11 | 6,000 | $126,660 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OLN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OLN
Institutional investors own 107.1% of Olin's shares and insiders 0.38%. The largest holder is Hotchkis & Wiley Capital Management LLC with 14.06% of the shares (16.0M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 9 reduced their stake in the latest filings. Short interest is 14.41% of the float, or 5.33 days of average trading volume. The share count rose 44.5% since 2014.
Related: OLN analyst forecast, OLN key metrics, OLN dividend history. See the OLN stock overview for the latest quote and news.
OLN ownership FAQ
Who owns the most Olin stock?
The largest shareholders of Olin are Hotchkis & Wiley Capital Management LLC (14.06%), BlackRock Inc (10.51%), Dimensional Fund Advisors, Inc. (5.41%), AQR Capital Management LLC (4.83%), Vanguard Portfolio Management, LLC (4.78%).
What percentage of Olin is owned by institutions?
Institutions hold 107.1% of Olin's shares outstanding; insiders hold 0.38%.
Which funds own Olin?
The largest fund holders of Olin are Vanguard Windsor II Inv (4.39%), iShares Core S&P Mid-Cap ETF (3.60%), Vanguard MStar Total Stk Mkt Idx Invest (3.19%), Undiscovered Managers Behavioral Val L (2.82%), Vanguard Small Cap Index (2.25%).
What is Olin's short interest?
14.2M shares of Olin were sold short, 14.41% of the float; at the average daily volume it would take 5.33 days to cover.
Are insiders buying or selling Olin?
Of the latest 5 reported insider transactions in Olin (since August 13, 2025), 0 were purchases and 5 were sales.
How many shares of Olin are outstanding?
Olin has 114.0M shares outstanding, of which 107.6M are in the public float.